Oscillating device



Aprll 19, 1927. J. L. MILTON OSCILLATING nnvxcm Filed March 10. 1924 2 Shaw-Shut 1 1,62 1927' J. L. MILTON 5132 OSCILLATING DEVICE Filed March 10' 1924 2 Shuts-Shut 2 In I7 it's FIG 6 Patented Apr. 19,

JOHN LEWIS MILTON OF LOUISVILLE, KENTUCKY.

OSCILLATING DEVICE.

Application filed March 10, 1924. Serial No. 698,133.

This invention relates to in'iprovements in oscillating devices in general and more specifically as applied to oscillating megnetos adapted for use in connection with gas engines.

A. specific object 0t this invention is to produce a long lived acceleratinn device on ploying. spring energy. In devices made in accordance with the disclosure in my copending application Serial Number $6,740 filed January 12, 1921, I found that the rotor member would successfully operate a. engine at higher R. P. M. then any other 0scillutor known to applicant, but the life of the spring-atthis hit-g1 speed was relatively short due to the shock the spring suffered in stopping; so suddenly. Consequently I sought to improve the device and have overcome this "Feature by providing a yielding or cushioned stop for the spring operating the rotor directly. And in addition thereto I have produced an oscillator magneto device that operates at even very much greater speeds than the oscillator generator just referred to in my (to-pending application.

A. Further object of this invention is to so dispose the vital parts of the oscillating mechanism and its co-operating ignition timer parts, that they can be mounted an integral unit and completely protected from the elements.

For the purpose-0t disclosing; my invention and its application, I have selected the accompanying drawings in which Figure l is a transverse cross-sectional view of asubstantially full size scale of n magneto with my oscillating device attached thereto. Fig. 9..is a top view of Fig. 1 from line 2-2 omitting, the shaft. springs and part of the bearing. Fin: 3 is an end view of Fig. 1. with the trip lever and cover omitted. Fig.4 is. an end view of Fig. 1 showing primarily the trip lever and cover. Fig. 5'shows the type of torsion springs employed. Fig. 6 is a modified construction oi my oscillating device. Fig. 7 isnnend view of Fig. 6. Fig. Sis a View of a modified form of trip oroperatingr lever. Fig. 9 is an end-view of Fig. 8.

Bearingflmember l. is made ofnny suitable magnetic or nonmagnetic material, 2 is n rotor and shaft. 3 is a trip lever removubly mounted on hub 5 which is keyed to the shaft, 6 is. an operating: urm riveted to hub 5 with rivets 5, 5; on opemting, arm 6 is termeda projection, called a'stop 6" there are two other stops, 7 and 8; 7 is a buffer yoke member and is removably mounted on sleeve 9 which freely oscillates with 7 on bearing member 1. This butter yoke menu her can be mounted. directly on hearing, without sleeve 9. Stop 8 isufixed, the adjustable on hearing member 1. Double acting torsion springs 10, 11. are loosely mounted on sleeve 9 so that their ends engage the stops, the ends of 10 engage stops 7. 8 and the ends of ll engage stops 6, 7. The springs may he of the same or varying degrees of'strength with reference to each other and I prefer to place them under initial tension especially when very high speed operations are desiredor a heavy rotor used.

lVhen assembled and at rest the sever-ail movable parts are positioned as shown in Figs. 1, 3, 4:. As trip lever 3 and rotor are n'io'ved in u clockwise direction from rest by pin X attached. to a rotatii'igpart 0t theengine on which the magneto is mounted, spring end 1]. is moved from rest and tends to carrv its other end 11 with it however it is yieldingiy resisted by stop 7 a part of butter yoke member 7, which operai ion pieces soring; 10 under st nin. Buii'er membcr 7 is in turn yieldingly resisted by its having to strain spring 10 end 10 ofwhich is now being forced to follow the travel of buffer yoke 7 and its stop 7, the other end 10" of spring 10 is held against stationery stop 8 by the pressure oi": spring 10 against said. stop.

When the trip lever and rotor are released by pin X the stressed springs 10, 11 rapidly return these members in a reverse direction to the straining operation to rest. There is very little overhaul and oscillation prior to restis pincticall instantaneous as two springs are employed and they cushion each other. Both springs impel and then arrest the rotor shaft, the parts attached thereto and buffer yoke 7. In the process of return inc; to rest, end ll of spring 11 drives arm 6 thru its stop 6 in therevcrsedirection, end 11 mildly picks up stop 7 of butter 7 which has previously been put into motion in this same reverse direction by spring- 10 through its end 10. this motion starts immediately atter trip lever 3 is released. Spring); ll thereby relieved ota shock which would be the case it the stop 7 were rigid as in my former torsion spring oscillator. Special emphasis is laid to this cushioning feature which gives long life to the springs.

Specific attention is directed to the scope of action of the two springs being substantially equal where they are of substantially equal strength and that spring 11 makes a partial bodily rotation in both directions whereas spring 10 is held in a substantially fixed position except for the movements of its ends.

For a given travel of trip lever 3 and rotor 2. the ends 01" the two springs as employed in this invention have one half the travel necessary where only one spring is used as in my former application, hence the muchly desired and sought high speed of operation, the absence of which has prevented the low priced oscillator magneto from use on the smaller sized high speed stationary gasoline engines. .Trip lever 3 and parts attached thereto have a scope of action or travel of substantially twice that or intiwmediate buter yoke member 7. in action bot-h springs are forced to balance each other. By makingspring 10 stronger than 11, the relative scope of travel of its ends will be lessened.

In a moditied term of my invention which I have shown in Figs. 6. 7 spring; 15 acts directly on the. stronger spring" 16 without an intermediate butter member. Trip lever 17 is rigidly attached to hub 18 which is keyed to rotor sia'ft 2 which is mounted in bearing '1 and is therefore tree to move with said shaft. Nut 19 screws on the shaft 2 and holds hub 18 in place. Spring 16 is of the same type torsion spring" as shown in Fig. 5, however it is provided with right angle extensions 16, 1G" to its ends which bear heavil against stop 20 which is fixed to hearing: 1. Spring 15 is of the conventional torsion type such as is used in looks, guns, et cetera. rip lever "ii is formed with arms 17, 17 and so proportioned and corelated to spring ends 15, 1 that they will embrace same so that a movement of trip lever 17 in either direction will tension spring 15 with the same relative influence on spring 16 and movable parts as described and explained For the former oscillator mechanism.

Figs. 8, 9 show the trip lever 3 formed integrally with arm 6 of Fig. 1, which arrangement. however. precludes using cover 20 as shown in Figs. 1, 4-.

To obtain maximum results from the small amount of materials used I find it desirable for the winding on the generating pole to be open circuited during the cocking period, i. 0. when the inductor is being forced into alignment with the polar face so as to cause the magnetic flux to thread through the winding. While this may be accomplished in other ways, I have illustrated an oscillating timer lever 25 pivoted in bearing 28 formed by pin 25 (attached to the lever) and bearing 1 which I have shown as forming an integral part of the main bearing member 1. Lever 25 carries two buffer blocks,

2627 and so disposed as to contact with lug 6 or arm 6 as it oscillates which has been described heretofore.

In Fig. 2 timer lever 25 is shown in electrical contact with its companion contact member 24-, thereby closing the primary winding of the generator coil. Operating big 6" carries the timer lever over center where compression spring 29 firmly holds it so that the timer points remain closed independently of said operating lug while arm 7) and all parts attached thereto proceed in their cycle oi operation under influence of the oscillator springs. preach the other end of this oscillation, simultaneous with the shifting, of the magnetisin "from the wire wound pole to the bypass arm 6" contacts butter 26 of lever 25, opens the primary circuit and thereby produces the objective high tension spark. Simultaneous with this operation, lever 25 mechanically contacts perch 1 and is retained there by spring 29, thereby holding the primary circuit open. It will be noted that the timer points are actually closed by spring 29 and abruptly opened by a hammer blow from arm I).

lVhat I claim as no and desire to protect by Letters Patent is:

1. An oscillating mechanism comprising fixed and driving members ant. an intermediate movable butter member and spring: means, operatively disposed, adjacent said fixed, driving and intermediate members.

2. An oscillating mechanism comprising tixed and driving members, an intermediate bufier member, movable over a common center, and a plurality of springs, opcratively disposed, and co-acting on all of said members.

3. An oscillating mechanism comprising; fixed and driving members and an intermediate yieldingly positioned movable buffer member and spring means operatively disposed, adjacent said fixed, driving and intermediate members.

4. An oscillating mechanism comprising fixed, driving and intermediate movable buffer members and spring means. operatively disposed, adjacent said fixed, driving and intermediate members, and means for operating same.

5. An oscillating mechanism comprising a fixed. a driving member, an intermediate movable buffer member and two springs, one I of which is operatively disposed between the fixed and intermediate member and the other spring being operatively disposed between the intermediate and driving member.

6. An oscillating mechanism comprising fixed, driving and driven members and two torsion springs which actuate the mechanism and arrest the movable members to a predetermined position.

7. An oscillating mechanism comprising As these parts ap- Ill) two movable members and a fixed member and two springs operatively connecting all of said members so that upon operation, one of said .movable members will have a scope of action in both directions in excess of the other movable or intermediate buffer member.

8. An oscillating mechanism comprising two movable members and a fixed member and two springs opcratively connecting all of said members so that upon operation, one of said movable members will have a scope of action in both directions in excess of the other movable or intermediate buffer member, and means for imparting a torsional strain to said springs.

9. An oscillating mechanism comprising two movable members and a fixed member and two springs operatively connecting all of said members so that upon operation, one of said movable members will have a scope of action in excess of the other movable or intermediate butter member, and means for imparting a torsional strain to said springs so that the release of said springs produces an accelerated rotation of the movable memhers.

10. An oscillating mechanism comprising two movable members and a fixed member and two springs operatively connecting all of said members so that upon operation, one of said movable members will have a scope of action in excess of the other movable or intermediate buffer member, and means for imparting a torsional strain to said springs, the several parts being so disposed and proportioned that one spring will act on the other spring through said intern'iediate bull? er member to absorb the shock of the parts as they return to normal position.

11. An oscillating mechanism comprising two movable and a fixed member and two springs operatively connecting all of said members so that upon operation, one of said movable members will have a scope of action t magneto and operatively connected to the magneto shaft, means for holding said springs in normal position, means for applying a torsional strain to said springs, so that the release of said springs produces an ac" celerated rotation of the magneto shaft and means whereby one spring acts upon the other spring to absorb the shock of the parts as they return to normal position.

13. In combination with an ignition generator, an inductor and a shaft for same, yieldingly held in a predetermined position by two springs surrounding the axis of said shaft which are so arranged. and disposed as to permit movement of said inductor in two directions.

14. In combination with an ignition generator, an inductor and a shaft for same, yieldingly held in a predetermined normal position by two springs surrounding the axis of said shaft which are so arranged and disposed as to permit movement of said inductor in two directions, and subsequently return to said normal position.

15. In combination with an ignition gonerator, an inductor and a shaft for same, yieldingly held in a predetermined normal position by two springs surrounding the axis of said shaft, means for actuating said springs, saidsprings being so arranged and disposed as to permit movement of said inductor in two directions and subsequently re turn to said normal position.

JOHN LEWIS MILTON. 

